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EP1080796B1 - Dispositif de tamisage pour matériaux en vrac - Google Patents

Dispositif de tamisage pour matériaux en vrac Download PDF

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Publication number
EP1080796B1
EP1080796B1 EP00117977A EP00117977A EP1080796B1 EP 1080796 B1 EP1080796 B1 EP 1080796B1 EP 00117977 A EP00117977 A EP 00117977A EP 00117977 A EP00117977 A EP 00117977A EP 1080796 B1 EP1080796 B1 EP 1080796B1
Authority
EP
European Patent Office
Prior art keywords
screening
tooth
stars
teeth
sieve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00117977A
Other languages
German (de)
English (en)
Other versions
EP1080796A1 (fr
Inventor
Albert Zubrägel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Albert Zubragel Maschinenbau GmbH
Original Assignee
Albert Zubragel Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Albert Zubragel Maschinenbau GmbH filed Critical Albert Zubragel Maschinenbau GmbH
Publication of EP1080796A1 publication Critical patent/EP1080796A1/fr
Application granted granted Critical
Publication of EP1080796B1 publication Critical patent/EP1080796B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers
    • B07B1/155—Roller screens using corrugated, grooved or ribbed rollers the rollers having a star shaped cross section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers

Definitions

  • the invention relates to a screening device according to the preamble of claim 1 (see for example US-A-3 870 627).
  • Sieve devices are also according to EP 0 838 667 A2 known.
  • sieve stars By means of in a sieve deck located, rotatably on rotating shafts arranged sieve stars become fractions of the bulk material separated from each other.
  • the sieve stars form by means of due to the juxtaposition existing distances between two adjacent, with their teeth a sieving grid running past each other through which a good grain fraction of a Oversize fraction can be separated.
  • the distances between the sieve stars are dimensioned so that only the Parts of the good grain fraction fall through while the Parts of the oversize fraction can not pass through. she be through the on the waves and through the rotation of the waves also rotating Sweeping stars moved across the screen deck and for example, fed to a collection.
  • the parts of the oversized grain fraction are thereby replaced by the Teeth of the sieve stars moved. They can also be in Dental valleys of the screen stars fall or arrive, where they due to the centrifugal force acting on the rotation the screen stars can be thrown out again.
  • the tossling out of a tooth valley of a sieve star can do this by the teeth of this Siebstern adjacent sieve stars of an adjacent wave be supported by the in the direction of rotation front edge of this sieve star at a in the dental valley located Studentskornteil is introduced and this by the further rotation of the Siebstern bearing Wave is lifted out of the tooth valley until that Ejection takes place.
  • known screening devices occur due to the interaction of two teeth each other neighboring sieve stars also bruises of parts of the Oversize fraction on.
  • the invention is based on the object Sieve of the type mentioned to show a more optimal separation of Gutkornfr worry and oversize fraction is possible, without that it to Verklemm- or Verquetschungserscheinungen of Overskorns between the individual screen stars comes.
  • the solution of the invention is on the one hand in the Education of the diameter of the sieve stars and on the other hand with the special shape of the teeth to these screen stars. It has been shown that at a Formation of the diameter d of each sieve after the above formula depending on the distance between two adjacent waves a clean Separation of the oversize fraction from the good grain fraction is possible.
  • the teeth of two adjacent Screen stars of two waves act in this diameter configuration so optimally together, that one in Zahntal a sieve star of a wave-fitting oversize part from the front tooth flank in the direction of rotation each adjacent Siebsterns raised from the dental valley becomes. Even already jammed or jammed and thus stuck parts of the oversize fraction are with Advantage forcibly from the tooth valley about radially transported outside.
  • At least each tooth flank has at least one Section on which has a straight course.
  • the screening device according to the invention also has the whole special advantage that they are under load, so in already poured onto a sieve deck bulk material, can be approached. Because no jamming, bruising or the like by appropriate power reserves of the drive to overcome obstacles of the The screening process can inevitably occur Drive power of the Siebbvorraum invention lower than conventional sieves.
  • areas of in Rotation direction of the front tooth flanks of the teeth respectively a curved, in particular approximately parabolic Have history, such that the tooth flank, from Dental Valley starting, has a concave shape.
  • the front tooth flank is a Lifting an oversized fraction from the dental cavity optimized for a neighboring sieve star.
  • the training of the sieve stars is incidentally on the basis of to determine the sieved oversize fraction. Especially shall be determined by the size of the oversize fraction, how many teeth each of the sieves has. For the Most use cases is a sieving with for example, 8 teeth suitable. But also possible Siebsterne with 12 or 24 teeth, namely, if the Parts of oversize fraction smaller dimensions exhibit. Numbers of teeth of each sieve are possible, which are divisible by 4 without remainder. The smallest possible number of teeth is thus the 4, otherwise at several waves with a different number of teeth a handover or elimination of oversize at right angles not given is.
  • the rotational speed of the waves of the invention Sieve is changeable, but it is to strive that the waves of each screen deck each at the same speed and in the same direction rotate.
  • Each screen deck of a screening device consists of one Variety of waves, each with a variety of Screen stars are stocked.
  • Has a screening device at least one screen deck.
  • FIG. 1 shows two aborted illustrated shafts 1 and 1 'of a part of a screen deck the screening device.
  • the waves 1 and 1 ' are parallel aligned with each other and in the same plane arranged. They rotate around their longitudinal axes, there are the rotational speeds of both shafts 1 and 1 ' equal.
  • the gap 3 results in each case from the Distance between the side surfaces of the screen stars 2, 2 ', 2 ''. Through the gap 3 an opening is provided, through which the Gutkornfr quasi can fall through.
  • the parts of the oversized grain fraction do not fall through the Column 3, because they are smaller as the dimensions of the parts of the oversize fraction.
  • One Part of the oversize fraction can only enter a dental valley between two consecutive teeth of a Siebsterns arrive.
  • Figs. 2 to 5 is a part 4 of the oversize fraction represented, which has entered a dental valley 5.
  • Fig. 2 shows the part 4 in the area of the bottom of the tooth valley 5 of the sieve star 2, being already through the whole Section 9 'of the front tooth flank in the direction of rotation 7 'of a tooth 6' of the adjacent sieve star 2 '(resp. 2 '') is raised from the tooth valley 5. That the part 4 raised by the tooth 6 'of the adjacent screen star 2 is characterized by a special sizing of cooperating screen stars 2, 2 'and 2' 'guaranteed.
  • each of the screen stars 2, 2 ', 2 is equal to the square root of 2 ⁇ 2 , where t is the distance between the longitudinal axes of the shafts 1, 1' not shown in FIG. 2.
  • To lift the part 4 also contributes to the slightly curved, preferably parabolic course of the front tooth flank 7, 7 ', in its from the bottom of the tooth valley 5, 5' farthest section 9, 9 'or approximately in the region of the head of a tooth 6, 6 'changes from a concave curve to a straight course.
  • Fig. 5 shows the path of movement of the part 4 via different rotational positions of the screen stars 2, 2 'away. It can be seen that part 4 is still around some Grade of rotational movement in the dental valley 5 is carried, but then by the tooth flank 7 'with the section 9 'of a tooth 6' of the adjacent sieve star 2 ' this is raised in a curve. Because between the tooth flanks 7, 7 'or their sections 9, 9' via certain of which are in operative connection with each other Teeth 6, 6 'in any rotational position, an angle smaller than 90 °, is a squeezing or jamming of the Part 4 excluded.
  • FIGS. 6 and 7 show similar movements of parts 4 of an oversize fraction, respectively.
  • the parts 4 larger dimensions, resulting in other configurations of the screen stars 2 and 2 'with respect to the number of teeth 6, 6' result.
  • each sieve star has 12 teeth.
  • the configuration of the front in the direction of rotation tooth flanks 7, 7 'with their straight sections 9, 9' is compared to the corresponding embodiments according to FIGS. 2 to 5 unchanged.
  • the diameter d of each sieve equals the square root of 2t 2 .
  • each siebstern 2 has eight teeth here.
  • the diameter of each sieve is the same 2t 2 ,

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Seal Device For Vehicle (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Catching Or Destruction (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Eye Examination Apparatus (AREA)
  • Crushing And Grinding (AREA)
  • Treatment Of Sludge (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Cereal-Derived Products (AREA)

Claims (6)

  1. Dispositif à tamis pour matières en vrac, avec au moins un couvercle de tamis, ayant plusieurs arbres alignés parallèlement les uns aux autres et tournant dans la même direction et avec la même vitesse, arbres sur lesquels des étoiles de tamis ayant des dents espacées radialement par rapport à l'arbre sont fixées côte à côte de telle sorte que les dents à chaque étoile de tamis d'un arbre tournent en peignant entre deux dents de tamis de chaque arbre parallèle voisin, moyennant quoi, chaque flanc de dent avant (7, 7') de chaque dent (6, 6') dans la direction de rotation comporte au moins une section (9, 9') qui présente une allure droite et cette section (9, 9') du flanc de dent (7, 7') ayant une allure droite est la section (9, 9') de chaque flanc de dent avant (7, 7') la plus éloignée du fond du creux de la dent (5), c'est-à-dire, s'écoulant par rapport à la tête de la dent,
       caractérisé en ce que,
       le diamètre d de chaque étoile de tamis (2, 2', 2'') est déterminé approximativement d'après la formule d = 2t 2 , moyennant quoi, t est l'écart entre les axes longitudinaux des arbres (1) voisins les uns des autres.
  2. Dispositif à tamis selon la revendication 1, caractérisé en ce que les zones des flancs de dent avant (7, 7') des dents (6, 6') dans la direction de rotation présentent une allure courbe, moyennant quoi, à partir du creux de la dent (5), l'allure est une parabole concave.
  3. Dispositif à tamis selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que chaque étoile de tamis (2, 2', 2'') est plus mince que la largeur de la fente (3) entre les étoiles de tamis (2, 2', 2'') tournant côte à côte.
  4. Dispositif à tamis selon l'une quelconque des revendications précédentes, caractérisé en ce que le creux des dents d'une étoile de tamis (2, 2', 2'') individuelle correspond à une dent qui peut être divisée en quatre sans résidu.
  5. Dispositif à tamis selon la revendication 4, caractérisé en ce que chaque étoile de tamis (2) comporte huit dents (6, 6').
  6. Dispositif à tamis selon l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse de rotation des arbres (1,1') peut être modifiée.
EP00117977A 1999-09-06 2000-08-22 Dispositif de tamisage pour matériaux en vrac Expired - Lifetime EP1080796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19942402A DE19942402C1 (de) 1999-09-06 1999-09-06 Siebvorrichtung für Schüttgüter
DE19942402 1999-09-06

Publications (2)

Publication Number Publication Date
EP1080796A1 EP1080796A1 (fr) 2001-03-07
EP1080796B1 true EP1080796B1 (fr) 2003-11-12

Family

ID=7920922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00117977A Expired - Lifetime EP1080796B1 (fr) 1999-09-06 2000-08-22 Dispositif de tamisage pour matériaux en vrac

Country Status (11)

Country Link
US (1) US6296124B1 (fr)
EP (1) EP1080796B1 (fr)
JP (1) JP2001096231A (fr)
CN (1) CN1290577A (fr)
AT (1) ATE253989T1 (fr)
BR (1) BR0003991A (fr)
CA (1) CA2317312C (fr)
DE (2) DE19942402C1 (fr)
DK (1) DK1080796T3 (fr)
ES (1) ES2209734T3 (fr)
PT (1) PT1080796E (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352796A1 (de) * 2003-11-12 2005-06-23 Backers Maschinenbau Gmbh Siebaggregat und Siebstern
EP1725335B1 (fr) * 2004-01-30 2011-10-05 Mmd Design & Consultancy Limited Concasseur de mineraux rotatif
DE202008016913U1 (de) * 2008-12-22 2010-05-20 Doppstadt Familienholding Gmbh Siebstern, insbesondere für eine Sternsiebmaschine
WO2019183616A1 (fr) 2018-03-23 2019-09-26 Lanxess Solutions Us Inc. Disque de tri et procédé d'amélioration de la durabilité de celui-ci
US11890782B2 (en) 2020-06-05 2024-02-06 Vermeer Manufacturing Company Mixing systems having disk assemblies

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU259866A (en) * 1967-03-08 1968-09-12 An improved screening mechanism
US3870627A (en) * 1972-11-27 1975-03-11 John W Herkes Mechanical screening device for machine-harvested sugar cane
JPS55116474A (en) * 1979-02-28 1980-09-08 Yukio Terada Ball selecting or selecting device
JPS5919750B2 (ja) * 1980-02-12 1984-05-08 極東開発工業株式会社 回転篩機
JPH0346045Y2 (fr) * 1987-05-14 1991-09-27
DE4415815A1 (de) * 1994-05-05 1995-11-09 Gerhard Dipl Ing Mock Siebvorrichtung
JP2669792B2 (ja) * 1994-09-06 1997-10-29 株式会社御池鐵工所 選別機ロータ
JP2665461B2 (ja) * 1994-11-28 1997-10-22 株式会社御池鐵工所 選別機
JP2719758B2 (ja) * 1994-12-08 1998-02-25 川崎重工業株式会社 回転篩
DE19643589A1 (de) 1996-10-22 1998-04-30 Albert Zubraegel Maschinenbau Verfahren und Vorrichtung zur Bestimmung des Liefervolumens einer Partie in Form von Schüttgut vorliegender Bodenhilfsstoffe und Kultursubstrate

Also Published As

Publication number Publication date
DE50004408D1 (de) 2003-12-18
CA2317312A1 (fr) 2001-03-06
PT1080796E (pt) 2004-04-30
ES2209734T3 (es) 2004-07-01
CA2317312C (fr) 2008-07-29
CN1290577A (zh) 2001-04-11
US6296124B1 (en) 2001-10-02
DE19942402C1 (de) 2001-07-05
ATE253989T1 (de) 2003-11-15
JP2001096231A (ja) 2001-04-10
DK1080796T3 (da) 2004-03-22
BR0003991A (pt) 2002-07-23
EP1080796A1 (fr) 2001-03-07

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